CVE-2021-32765
Integer Overflow to Buffer Overflow in Hiredis
- State
- Published
- Severity
- 8.8 High
- Published
- Oct 4, 2021
- Updated
- Aug 3, 2024
- Reserved
- May 12, 2021
Description
Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count * sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't itself make this check, it would result in a short allocation and subsequent buffer overflow. Users of hiredis who are unable to update may set the [maxelements](https://github.com/redis/hiredis#reader-max-array-elements) context option to a value small enough that no overflow is possible.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | GitHub_M |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
hiredisredis |
|
References
- https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2
- https://github.com/redis/hiredis/commit/76a7b10005c70babee357a7d0f2becf28ec7ed1e
- https://wiki.sei.cmu.edu/confluence/display/c/MEM07-C.+Ensure+that+the+arguments+to+calloc%28%29%2C+when+multiplied%2C+do+not+wrap
- [debian-lts-announce] 20211012 [SECURITY] [DLA 2783-1] hiredis security updatemailing-list
- https://security.netapp.com/advisory/ntap-20211104-0003/
- GLSA-202210-32vendor-advisory
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